US12035320B2 - Signal transmission method and apparatus, signal reception method and apparatus and communication system - Google Patents
Signal transmission method and apparatus, signal reception method and apparatus and communication system Download PDFInfo
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- US12035320B2 US12035320B2 US17/241,325 US202117241325A US12035320B2 US 12035320 B2 US12035320 B2 US 12035320B2 US 202117241325 A US202117241325 A US 202117241325A US 12035320 B2 US12035320 B2 US 12035320B2
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Definitions
- This disclosure relates to the field of communication technologies, and in particular to a signal transmission method and apparatus, a signal reception method and apparatus and a communication system.
- a synchronization signal/physical broadcast channel block may have a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH).
- PSS primary synchronization signal
- SSS secondary synchronization signal
- PBCH physical broadcast channel
- a network device may transmit multiple SSBs via beams in different directions, thereby increasing a coverage angle of a cell.
- the terminal may perform time-frequency synchronization during an initial access phase by using the SSBs, and may also perform radio resource management (RRM) and/or radio link monitoring (RLM).
- RRM radio resource management
- RLM radio link monitoring
- the SSBs may be transmitted at a default resource in the time interval.
- the time interval is, for example, a half-frame, and a length of the time interval is, for example, 5 milliseconds (ms).
- FIG. 1 is a schematic diagram of default transmission resources of SSBs in a half-frame.
- a subcarrier spacing is 30 kHz and a carrier frequency is less than 3 GHz, in which case the network device transmits total 4 SSBs in a half-frame, namely, SSB 1 , SSB 2 , SSB 3 , SSB 4 , in which 1, 2, 3 and 4 are respective index values of the SSBs; initial transmission resources of the SSBs are symbol 2 of slot 0 , symbol 8 of slot 0 , symbol 2 of slot 1 and symbol 8 of slot 1 in the half-frame, respectively, and the network device transmits the SSBs in an ascending order of the index values.
- FIG. 1 there exists a default correspondence between the index values of the SSBs and slot indices and symbol indices.
- a terminal equipment blindly detects the SSBs.
- a slot index and a symbol index are obtained via an index value of the SSB according to a subcarrier spacing and a default time-frequency resource position of the index value of the SSB.
- a system frame number is obtained via a PBCH in the SSB, hence, the terminal equipment may obtain downlink time synchronization.
- the network device In using an unlicensed frequency band for communication, the network device needs to perforn listen before talk (LBT) before transmitting data, so as to detect whether a channel is idle.
- LBT listen before talk
- the data may be transmitted when a detection result is that the channel is idle, and a transmitting device needs to detect again if the channel is busy, and until the channel is idle, the data may be transmitted by using the unlicensed frequency band.
- FIG. 2 is a schematic diagram of transmitting SSBs in case of LBT. As shown in FIG. 2 , if a channel is busy before a default transmission resource of an SSB, that is, the LBT fails, the SSB is unable to be transmitted at a default time. And when the LBT is successful, a transmission resource after the LBT may be used for transmitting SSBs.
- a cell has total 4 SSBs, namely, SSB 1 , SSB 2 , SSB 3 and SSB 4 .
- the transmission resources 201 , 202 , 203 and 204 in FIG. 2 are default transmission resources of SSB 1 .
- a signal reception apparatus provided in a terminal equipment, the apparatus including:
- a communication system including a terminal equipment and a network device, the network device including the transmission apparatus as described in the first aspect, and the terminal equipment including the reception apparatus as described in the second aspect.
- An advantage of the embodiments of this disclosure exists in that the transmission resources of the information blocks are indicated by the indication information, hence, even though the default correspondence between the information block indices and the transmission resources is to be changed, the transmission resources to which the information blocks correspond may be determined, and the terminal equipment is facilitated in downlink synchronization.
- FIG. 4 is a schematic diagram of the signal transmission method
- FIG. 9 is a schematic diagram of denoting indication information by using a relative relationship between SSBs and other signals or channels:
- FIG. 11 is another schematic diagram of the first time-frequency resources and the candidate resources
- FIG. 13 is a schematic diagram of the signal transmission apparatus of Embodiment 3.
- FIG. 14 is a schematic diagram of the signal reception apparatus of Embodiment 4.
- FIG. 15 is a schematic diagram of a structure of the terminal equipment of an embodiment of this disclosure.
- the base station may include but not limited to a node B (NodeB or NB), an evolved node B (eNodeB or eNB), and a 5G base station (gNB), etc. Furthermore, it may include a remote radio head (RRH), a remote radio unit (RRU), a relay, or a low-power node (such as a femto, and a pico, etc.).
- NodeB or NB node B
- eNodeB or eNB evolved node B
- gNB 5G base station
- RRH remote radio head
- RRU remote radio unit
- relay or a low-power node (such as a femto, and a pico, etc.).
- base station may include some or all of its functions, and each base station may provide communication coverage for a specific geographical area.
- a term “cell” may refer to a base station and/or its coverage area, which is dependent on a context of the term.
- the terminal equipment may include but not limited to the following devices: a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a hand-held device, a machine-type communication device, a lap-top, a cordless telephone, a smart cell phone, a smart watch, and a digital camera, etc.
- PDA personal digital assistant
- wireless modem a wireless communication device
- hand-held device a machine-type communication device
- a machine-type communication device a lap-top
- a cordless telephone a smart cell phone, a smart watch, and a digital camera, etc.
- the user equipment may also be a machine or a device performing monitoring or measurement.
- the user equipment may include but not limited to a machine-type communication (MTC) terminal, a vehicle mounted communication terminal, a device to device (D2D) terminal, and a machine to machine (M2M) terminal, etc.
- MTC machine-type communication
- D2D device to device
- M2M machine to machine
- eMBB enhanced mobile broadband
- MTC massive machine type communication
- URLLC ultra-reliable and low-latency communication
- the terminal equipment 302 may transmit data to the network device 301 , for example, in a grant or grant-free transmission manner.
- the network device 301 may receive data transmitted by one or more terminal equipments 302 , and feed back information, such as acknowledgement/non-acknowledgement (ACK/NACK) information) to the terminal equipment 302 .
- ACK/NACK acknowledgement/non-acknowledgement
- the terminal equipment 302 may acknowledge the end of a transmission process according to the feedback information, or may perform new data transmission, or perform data retransmission.
- the network device transmits control information, the control information being used to indicate information blocks in the information block group that are not transmitted by the network device in the time interval, or instruct the terminal equipment not to report a measurement result in the time interval, the measurement result being a measurement result of one of radio resource management (RRM), radio link measurement and channel state measurement.
- the control information may be common control information, that is, all terminal equipments served by the cell may receive the common control information, or the control information may be group common control information, that is, only a group of terminal equipments in terminal equipments served by the cell may receive the control information.
- FIG. 8 is a schematic diagram of predetermined time-frequency resources. As shown in FIG. 8 , 80 ⁇ 87 are predetermined 8 time-frequency resources for transmitting information blocks in a time interval, and candidate starting symbols 0 ⁇ 4 correspond to starting symbols of the time-frequency resources 80 ⁇ 84 respectively; wherein a candidate starting symbol 0 is, for example, a symbol 4 of slot 0 in the time interval.
- the indication information includes: identification information of the candidate resource to which the candidate resource corresponds in the integral number of first time-frequency resources.
- the network device starting from the candidate resource, sequentially transmits the at least one information block on a predetermined time-frequency resource used for transmitting information block within the time interval: and the calculating unit obtains the time synchronization according to the predetermined time-frequency resource.
- the calculating unit obtains the time synchronization according to a correspondence between the indication information and time.
- the indication information is expressed as a relative time domain or frequency domain mapping relationship between SSBs in the information block and other signals or channels.
- the central processing unit 1501 may be configured to control so that the terminal equipment 1500 carries out the method described in Embodiment 2.
- Embodiment 2 for other configurations of the central processing unit 1501 , which shall not be described herein any further.
- the apparatus 1400 and the central processing unit 1501 may be configured separately; for example, the apparatus 1400 may be configured as a chip connected to the central processing unit 1501 , and the functions of the apparatus 1400 are executed under control of the central processing unit 1501 .
- the transmission resources of the information blocks are indicated by the indication information, hence, even though the default correspondence between the information block indices and the transmission resources is to be changed, the transmission resources to which the information blocks correspond may be determined, and the terminal equipment is facilitated in downlink synchronization.
- the embodiment of this disclosure provides a network device.
- a principle of the device for solving problems is similar to that of the method in Embodiment 1, reference may be made to the implementation of the method in Embodiment 1 for implementation of this device, with identical contents being going to be described herein any further.
- FIG. 16 is a schematic diagram of a structure of the network device of the embodiment of this disclosure.
- a network device 1600 may include a central processing unit (CPU) 1601 and a memory 1602 , the memory 1602 being coupled to the central processing unit 1601 .
- the memory 1602 may store various data, and furthermore, it may store a program for data processing, and execute the program under control of the central processing unit 1601 .
- the functions of the apparatus 1300 may be integrated into the central processing unit 1601 ; wherein the central processing unit 1601 may be configured to carry out the method in Embodiment 1.
- the central processing unit 1601 may be configured to control so that the network device 1600 carries out the method described in Embodiment 1.
- Embodiment 1 for other configurations of the central processing unit 1601 , which shall not be described herein any further.
- the apparatus 1300 and the central processing unit 1601 may be configured separately; for example, the apparatus 1300 may be configured as a chip connected to the central processing unit 1601 , such as the units shown in FIG. 16 , and the functions of the apparatus 1300 are executed under control of the central processing unit 1601 .
- the network device 1600 may include a transceiver 1603 , and an antenna 1604 , etc. Functions of the above components are similar to those in the related art, and shall not be described herein any further. It should be noted that the network device 1600 does not necessarily include all the parts shown in FIG. 16 , and furthermore, the network device 1600 may include parts not shown in FIG. 16 , and the related art may be referred to.
- the embodiment of this disclosure provides a communication system, at least including the terminal equipment 1500 described in Embodiment and the network device 1600 described in Embodiment 6. Contents of embodiments 5 and 6 are incorporated herein, and shall not be described herein any further.
- the transmission resources of the information blocks are indicated by the indication information, hence, even though the default correspondence between the information block indices and the transmission resources is to be changed, the transmission resources to which the information blocks correspond may be determined, and the terminal equipment is facilitated in downlink synchronization.
- An embodiment of this disclosure provides a computer readable program, which, when executed in a transmitting device or a network device, will cause the transmitting device or the network device to carry out the method described in Embodiment 1.
- An embodiment of this disclosure provides a computer storage medium, including a computer readable program, which will cause a transmitting device or a network device to carry out the method described in Embodiment 1.
- An embodiment of this disclosure provides a computer readable program, which, when executed in a receiving device or a terminal equipment, will cause the receiving device or the terminal equipment to carry out the method described in Embodiment 2.
- An embodiment of this disclosure provides a computer storage medium, including a computer readable program, which will cause a receiving device or a terminal equipment to carry out the method described in Embodiment 2.
- the above apparatuses and methods of this disclosure may be implemented by hardware, or by hardware in combination with software.
- This disclosure relates to such a computer-readable program that when the program is executed by a logic device, the logic device is enabled to carry out the apparatus or components as described above, or to carry out the methods or steps as described above.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a floppy disk, a CD, a DVD, and a flash memory, etc.
- the methods/apparatuses described with reference to the embodiments of this disclosure may be directly embodied as hardware, software modules executed by a processor, or a combination thereof.
- one or more functional block diagrams and/or one or more combinations of the functional block diagrams shown in FIGS. 13 and 14 may either correspond to software modules of procedures of a computer program, or correspond to hardware modules.
- Such software modules may respectively correspond to the steps shown in FIGS. 4 and 12 .
- the hardware module for example, may be carried out by firming the soft modules by using a field programmable gate array (FPGA).
- FPGA field programmable gate array
- the soft modules may be stored in the MEGA-SIM card or the flash memory device of a large capacity.
- a signal transmission apparatus provided in a network device, the apparatus including:
- the time interval includes an integral number of first time-frequency resources used for transmitting the information block:
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Abstract
Description
-
- a transmitting unit configured to transmit indication information indicating one candidate resource in at least two candidate resources within a time interval, wherein, one information block of at least one information block transmitted by the network device within the time interval is transmitted at the one candidate resource in at least two candidate resources.
-
- a receiving unit configured to receive indication information by the terminal equipment, the indication information indicating one candidate resource in at least two candidate resources within a time interval, wherein, one information block transmitted by the network device is transmitted at the one candidate resource; and a calculating unit configured to obtain time synchronization according to the indication information.
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- step 401: the network device transmits indication information indicating one candidate resource in at least two candidate resources within a time interval, one information block of at least one information block transmitted by the network device within the time interval is transmitted at the one candidate resource.
-
- step 1201: the terminal equipment receives indication information, the indication information indicating one candidate resource in at least two candidate resources within a time interval, one information block transmitted by the network device is transmitted at the one candidate resource; and
- step 1202: the terminal equipment obtains time synchronization according to the indication information.
-
- in this implementation, the indication information is used to indicate that a candidate starting symbol of the first information block of the at least one information block is one of the at least two candidate starting symbols, for example, the indication information includes identification information of the candidate starting symbol;
- in this implementation, time domain intervals between neighboring candidate starting symbols are equal, and a unit of the time domain intervals is one of an orthogonal frequency division multiplexing (OFDM) symbol, a subframe, a millisecond, and the information block;
- in this implementation, the terminal equipment obtains time synchronization via the indication information, a size of the time domain interval, and an index value of the information block;
- in this implementation, the identification information of the candidate starting symbol includes identification information of an OFDM symbol with a predetermined index value in the time interval, and the terminal equipment obtains time synchronization via index values taken as the indication information and the information block;
- in this implementation, the network device may start from candidate starting symbol to sequentially transmit the at least one information block on predetermined time-frequency resources for transmitting information blocks within the time interval, in which case the terminal equipment may further need to obtain time synchronization with reference to a relationship between the predetermined time-frequency resources and time;
- in this implementation, the network device may also start from the candidate starting symbol to transmit the at least one information block according to a predetermined mapping relationship between the at least one information block, in which case the terminal equipment needs further to obtain time synchronization with reference to the predetermined mapping relationship;
- in this implementation, the indication information may be carried in a master system information block (MIB) of a PBCH or carried in system message block 1 (SIB1); or, the indication information may be denoted as a relative time domain or frequency domain relationship between SSBs in the information block and other signals or channels.
-
- in a particular example of this implementation, the indication information may include identification information of the candidate resource in the at least two candidate resources;
- in this example, the terminal equipment may determine the first time-frequency resource for transmitting the information block according to the identification information of the candidate resource and an index value of the received information block, thereby determining a starting symbol and slot sequence number of the first time-frequency resource and obtaining downlink synchronization;
- in this example, the indication information is carried in a master system information block (MIB) of a PBCH or system information block 1 (SIB1), or the indication information is denoted as a relative time-domain or frequency-domain mapping relationship between SSBs in the information block and other signals or channels.
-
- a
transmitting unit 1301 configured to transmit indication information indicating one candidate resource in at least two candidate resources within a time interval, one information block of at least one information block transmitted by the network device within the time interval is transmitted at the one candidate resource.
- a
-
- a
receiving unit 1401 configured to receive indication information transmitted by a network device, the indication information indicating one candidate resource in at least two candidate resources within a time interval, one information block transmitted by the network device is transmitted at the one candidate resource; and - a calculating
unit 1402 configured to obtain time synchronization according to the indication information.
- a
-
- a transmitting unit configured to transmit indication information indicating one candidate resource in at least two candidate resources within a time interval, wherein, one information block of at least one information block transmitted by the network device within the time interval is transmitted at the one candidate resource.
-
- the information block at least includes a synchronization signal/physical broadcast channel (PBCH) block (SSB).
-
- the indication information includes: identification information of a candidate starting symbol of at least two candidate starting symbols of a first information block in the at least one information block.
-
- time domain intervals of neighboring candidate starting symbols are equal, a unit of the time domain intervals being one of an OFDM symbol, a subframe, a millisecond, and the information block.
-
- the candidate starting symbol is an OFDM symbol of a predetermined index value within the time interval.
-
- the network device transmits at least one information block within the time interval in a manner that,
- starting from the candidate resource, the network device sequentially transmits the at least one information block on a predetermined time-frequency resource used for transmitting information block within the time interval.
-
- the network device transmits at least one information block within the time interval in a manner that,
- starting from the candidate starting symbol, the network device transmits the at least one information block according to a predetermined mapping relationship between the at least one information block.
-
- the time interval includes an integral number of first time-frequency resources, the first time-frequency resources being used for transmitting the information block;
- and the at least two candidate resources are at least two of the integral number of first time-frequency resources used for transmitting the information block of the same index value identification.
-
- the indication information includes: identification information of the candidate resource in the at least two candidate resources.
-
- the indication information includes: identification information of a first time-frequency resource to which the one candidate resource corresponds in the integral number of first time-frequency resources.
-
- the indication information is carried in a master information block (MIB) of a PBCH in the one information block, or is carried in a system information block 1 (SIB1).
-
- the indication information is expressed as a relative time domain or frequency domain mapping relationship between SSBs in the information block and other signals or channels.
-
- the indication information is indicated by a DMRS sequence and/or a payload of a PBCH in the one information block.
-
- a receiving unit configured to receive indication information transmitted by a network device, the indication information indicating one candidate resource in at least two candidate resources within a time interval, wherein, one information block transmitted by the network device is transmitted at one candidate resource; and
- a calculating unit configured to obtain time synchronization according to the indication information.
-
- the information block at least includes a synchronization signal/physical broadcast channel (PBCH) block (SSB).
-
- the network device transmits at least one information block within the time interval, the at least one information block including the one information block.
-
- the indication information includes: identification information of a candidate starting symbol of at least two candidate starting symbols of a first information block in the at least one information block.
-
- time domain intervals of neighboring candidate starting symbols are equal, a unit of the time domain intervals being one of an orthogonal frequency division multiplexing (OFDM) symbol, a subframe, a millisecond, and the information block.
-
- the identification information of the candidate starting symbol includes: the number of time domain intervals between the candidate starting symbol and a first candidate starting symbol in the at least two candidate starting symbols;
- and the calculating unit obtains the time synchronization according to the indication information, sizes of the time domain intervals and an index value of the one information block.
-
- the at least one candidate starting symbol is an OFDM symbol of a predetermined index value within the time interval;
- the identification information of the candidate starting symbol includes: identification information of the OFDM symbol of a predetermined index value;
- and the calculating unit obtains the time synchronization according to the indication information and the index value of the one information block.
-
- starting from the candidate resource, the network device sequentially transmits the at least one information block on a predetermined time-frequency resource used for transmitting information block within the time interval;
- and the calculating unit obtains the time synchronization according to the predetermined time-frequency resource.
-
- starting from the candidate starting symbol, the network device transmits the at least one information block according to a predetermined mapping relationship between the at least one information block;
- and the calculating unit obtains the time synchronization according to the predetermined mapping relationship.
-
- and the at least two candidate resources are at least two of the integral number of first time-frequency resources used for transmitting the information block of the same index value identification.
-
- the indication information includes: identification information of the candidate resource in the at least two candidate resources.
-
- the indication information includes: identification information of the first time-frequency resource to which the candidate resource corresponds in the integral number of first time-frequency resources.
-
- the calculating unit obtains the time synchronization according to a correspondence between the indication information and time.
-
- the calculating unit obtains an index value of one information block according to the indication information and the number of information blocks contained in at least one information block transmitted by the network device within the time interval.
-
- the indication information is carried in a master information block (MIB) of a PBCH in the one information block, or is carried in a system information block 1 (SIB1).
-
- the indication information is indicated by a DMRS sequence and/or a payload of a PBCH in the one information block.
-
- wherein, the network device includes the transmission apparatus as described in any one of supplements 1-13, and the terminal equipment includes the reception apparatus as described in any one of supplements 14-30.
Claims (5)
Applications Claiming Priority (1)
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PCT/CN2018/113839 WO2020087543A1 (en) | 2018-11-02 | 2018-11-02 | Signal sending method, signal receiving method, signal sending apparatus and signal receiving apparatus, and communication system |
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PCT/CN2018/113839 Continuation WO2020087543A1 (en) | 2018-11-02 | 2018-11-02 | Signal sending method, signal receiving method, signal sending apparatus and signal receiving apparatus, and communication system |
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US20220400470A1 (en) * | 2019-11-29 | 2022-12-15 | Sony Group Corporation | Terminal device, base station apparatus, and communication method |
JP2024527141A (en) * | 2021-08-04 | 2024-07-19 | 富士通株式会社 | Method and apparatus for transmitting and receiving signals, and communication system |
CN115835315A (en) * | 2021-09-16 | 2023-03-21 | 维沃软件技术有限公司 | Resource reselection method, device, communication equipment, storage medium and system |
WO2023082287A1 (en) * | 2021-11-15 | 2023-05-19 | 北京小米移动软件有限公司 | Information transmission method and apparatus therefor |
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JP2023026511A (en) | 2023-02-24 |
KR20210064350A (en) | 2021-06-02 |
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KR102499121B1 (en) | 2023-02-16 |
EP3876622A4 (en) | 2021-11-24 |
WO2020087543A1 (en) | 2020-05-07 |
EP3876622A1 (en) | 2021-09-08 |
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JP2022505980A (en) | 2022-01-14 |
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